Packing for pistons and piston-valves.



J. T. WELSON.

PACKING FOR PISTONS AND PISTON VALVES.

APPLICATION FILED FEB. 6. i918.

Patented Apr. 1,1919.

magma To all whom it may concern:

com: '1'. 'wiLson, or ALAMEDA, camronn'm.

PACKING FOR PISTONS AND PISTON-VALVES.

Be it known that I, JOHN" T.- WILSON, a

,; citizen of. the United States, residing at Alameda, in the county ofAlameda" and State of California, have invented certain new and usefulImprovements in Packmgs for Pistons and Piston-Valves, of Which thefollowi 'n is a specification.

Theo ject of my invention is the provision of an improved packing,com1nonly known as a packing, ring, for p stons and piston valves whichshall be'of very simple.

construction, form a fluid tight joint, compensate for wear, and whichcan be shipped and handled without the displacement or loss ofthe'jointpiece forming a partthereof.

-With this end inview, the nvention consists in a'cut, resilientmetallic ring having l a joint piece with a curved outer bearing surfacefor frictionally engaging the curved inner surface of a cylinder or-cage,.th'e

' joint piece fitting and interlocking with the separated ends 0the-ring so it will not rock sidewise, and will be held in place bymeans which willprevent its displacement when in use and when'removedifrom the groove of a "the piston or piston valves.

The accompanying drawin illustrates an example of the embodiment o theinvention constructed and the parts combined according to the best modeof procedure I far devised forthe purpose. I

" Figure 1 is across section in elevation of part of the piston valveandpart-cf a cage position ofthe two rings relshowing the ative to. aport.v,

. Fig. 2 is an end view inelevation of the entire valve on a smallerscale as seen when looking inthe direction of the arrow, the

flange of the head being in section on the line 2.--2, the sideof thering and the edge of the bull ringappearing. in .full.

' Fig.'3, 'shows*in. side elevation-the sepremoved.

aratedefids of the'ring, the joint piece be- .45 in%removed.. Q I 4 v 1ig. dis a central longltudmalvertical section of the-joint piece. F'g. 5is a top plan view'of the oint pieceand the ends of the ring. v Fig. 6is a op plan view of the oint Fig. 7 is across oblique'line 7..

Fig. 8 is a plan view of the inner surfaces have so piece" section of onthe Specification of Letters Patent. I Patented Apt. 1, 1919.Application filed February c, 1918. Serial Malacca.

Y of theends of rings; H, a joint piece; and I, the circular recesses orgrooves within. which the are loosely located.

The rings are resilient and, before insertion in the grooves, of agreater, diameter than the diameter ofthe interior of the cage opening.

rings To maintain the joint piece H -inplace between the ends of thering when the ring is shipped and handled, and also to force itoutwardly between the free ends of the ring, the inner surface of thering is provided with a groove 1, and the inner surface of the ointpiece withagroove 2, and within the grooves is located a loose spring 3,as

shown, the free ends being some dlstance apart so the body ofthe springbetween its ends'bears against the joint piece.

When a ring'is placed in a groove and the piston valve inserted in thecage, the

ring is contracted so the. outer curved bear- -ing surface and the outercurved bearing surface 4 of the joint piece frictionally engagethemterior of the cage or cylinder, the ring being joint piece match asshownin Fig. 2.

To prevent the joint piece'rocking side- .wise and to provide for wearand maintain- .ing a tight ]OlI1t, .the. ends of each ring isfastenedwithinclined surfaces 5, ,5,- and an inclined surface 6: locatedin a difl'erent 1 plane, and the joint piece matches these surfaces, thesame being fashioned with the inclined surfaces 7, 7 and 8 at each end.

The packing ring as a whole is very simple .in construction, .easilymanufactured, can be handled without the loss, of the joint piece, andwheninserted in its groove and in use, maintains a tight joint, as thecurved surface 4 of the joint piece provides an adequate bearing andwearing area. Moreover, the ring with the means for holding v the ointpiece in place floats in-the recess 5 t -1 recess, as there is a spacebeneath the ring,

I, that is, can bodily shift sidewisein the and always fitthe interiorsurface of the cage. This is a desirable "feature and disunder tension,and the ring and tingnishes the combination from many some What similarWhat I claim is: v 1. An integral cut resilient metallic packing ringhavingeach free end fashioned to form bearing surfaces 5 at oppositesides of the end of the ring and a bearing surface 6 at the extreme endof thering in a plane parallel with the planes of said bearing surfaces5, a joint piece provided With the exterior curved bearing surface ladapted to-frictionally engage the curved bearing surface of a cage orcylinder and also having at the opposite ends the surfaces 7 and 8 thesurfaces 7 matching the surfaces 5 at the ends of thering and. thesurfaces 8 matching the surfaces 6 at the ends of the ring, and meansfor holding the joint piece in place v v 2. An integral cut resilientmetallic packing ring having each free end fashioned to form bearingsurfaces 5 at opposite sides of the end of the ring and a bearingsurface 6 at the extreme end of the ring in a plane parallel with theplanes of said bearing surfaces 5, a joint piece provided with theexterior curved bearing surface 4 adapted to frictionally engage thecurved bearing surface of a cage or cylinder and also having at theopposite ends the surfaces 7 and 8 the surfaces 7- matching the surfaces5 at the ends of the ring and the surfaces 8 matching the surfaces 6 atthe ends of the ring, and resilient spring means carried by the ring forholding the joint piece in place.

In testimony whereof l a my signature.

JOHN T. mason.

